565423 has 4 divisors (see below), whose sum is σ = 566928. Its totient is φ = 563920.

The previous prime is 565393. The next prime is 565427. The reversal of 565423 is 324565.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 565423 - 2⁵ = 565391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (141732).

2⁵⁶⁵⁴²³ is an apocalyptic number.

565423 is a deficient number, since it is larger than the sum of its proper divisors (1505).

565423 is an equidigital number, since it uses as much as digits as its factorization.

565423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

The product of its digits is 3600, while the sum is 25.

The square root of 565423 is about 751.9461416884. The cubic root of 565423 is about 82.6909199418.

Adding to 565423 its reverse (324565), we get a palindrome (889988).

The spelling of 565423 in words is "five hundred sixty-five thousand, four hundred twenty-three".